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(function (window) {
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'use strict';
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/**
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* Creates a new Model instance and hooks up the storage.
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*
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* @constructor
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* @param {object} storage A reference to the client side storage class
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*/
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function Model(storage) {
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this.storage = storage;
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}
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/**
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* Creates a new todo model
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*
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* @param {string} [title] The title of the task
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* @param {function} [callback] The callback to fire after the model is created
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*/
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Model.prototype.create = function (title, callback) {
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title = title || '';
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callback = callback || function () {};
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var newItem = {
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title: title.trim(),
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completed: false
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};
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this.storage.save(newItem, callback);
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};
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/**
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* Finds and returns a model in storage. If no query is given it'll simply
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* return everything. If you pass in a string or number it'll look that up as
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* the ID of the model to find. Lastly, you can pass it an object to match
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* against.
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*
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* @param {string|number|object} [query] A query to match models against
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* @param {function} [callback] The callback to fire after the model is found
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*
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* @example
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* model.read(1, func); // Will find the model with an ID of 1
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* model.read('1'); // Same as above
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* //Below will find a model with foo equalling bar and hello equalling world.
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* model.read({ foo: 'bar', hello: 'world' });
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*/
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Model.prototype.read = function (query, callback) {
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var queryType = typeof query;
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callback = callback || function () {};
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if (queryType === 'function') {
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callback = query;
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return this.storage.findAll(callback);
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} else if (queryType === 'string' || queryType === 'number') {
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query = parseInt(query, 10);
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this.storage.find({ id: query }, callback);
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} else {
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this.storage.find(query, callback);
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}
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};
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/**
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* Updates a model by giving it an ID, data to update, and a callback to fire when
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* the update is complete.
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*
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* @param {number} id The id of the model to update
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* @param {object} data The properties to update and their new value
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* @param {function} callback The callback to fire when the update is complete.
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*/
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Model.prototype.update = function (id, data, callback) {
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this.storage.save(data, callback, id);
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};
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/**
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* Removes a model from storage
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*
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* @param {number} id The ID of the model to remove
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* @param {function} callback The callback to fire when the removal is complete.
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*/
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Model.prototype.remove = function (id, callback) {
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this.storage.remove(id, callback);
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};
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/**
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* WARNING: Will remove ALL data from storage.
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*
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* @param {function} callback The callback to fire when the storage is wiped.
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*/
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Model.prototype.removeAll = function (callback) {
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this.storage.drop(callback);
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};
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/**
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* Returns a count of all todos
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*/
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Model.prototype.getCount = function (callback) {
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var todos = {
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active: 0,
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completed: 0,
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total: 0
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};
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this.storage.findAll(function (data) {
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data.forEach(function (todo) {
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if (todo.completed) {
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todos.completed++;
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} else {
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todos.active++;
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}
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todos.total++;
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});
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callback(todos);
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});
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};
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// Export to window
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window.app = window.app || {};
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window.app.Model = Model;
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})(window);
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